Ambitus
The ambitus (Latin for “circuit”) is the range: the distance between the lowest and the highest note of a melody, a voice or an instrument. You give it as an interval or with the two limiting notes.
- Meaning
- distance from the lowest to the highest note
- Stated as
- an interval (e.g. a fifth) or with the limiting notes
- Measured
- in intervals or semitones
- Related
- finalis and mode
From the lowest to the highest note
To find the ambitus, you look for the lowest and the highest note and measure the distance between them. In the first example they lie a fifth apart, in the second a twelfth. This is a property of the melody: the rhythm and the starting note (C) are the same, but the range decides how easy it is to sing and how far it reaches.
Narrow ambitus: a fifth
The lowest note is C, the highest G: the ambitus is a perfect fifth, seven semitones. Many children's songs move in a space as narrow as this.
Wide ambitus: a twelfth
The lowest note is C, the highest G an octave and a fifth higher: the ambitus is a twelfth, 19 semitones. Such breadth demands more vocal range from singers.
Ambitus of voice, instrument and mode
Every voice and every instrument has its own ambitus, the range it can cover at all. The pages on the octaves name the registers: the small octave, above it the one-line octave with the standard pitch, the two-line octave and the three-line octave. A melody has to fit the ambitus of the performers.
In the teaching of the church modes the ambitus helps to determine the mode. Dorian and hypodorian have the same finalis, D, but different ambitus. The table puts the examples together.
| Example | Lowest note | Highest note | Ambitus |
|---|---|---|---|
| Melody 1 | C | G | perfect fifth (7 semitones) |
| Melody 2 | C | G, an octave higher | twelfth (19 semitones) |
| Dorian (authentic) | D | D, an octave higher | octave (12 semitones) |
| Hypodorian | A | A, an octave higher | octave (12 semitones) |
Common mistakes
- Confusing ambitus and key: The key orders the notes, the ambitus measures their distance.
- Counting only the number of notes: The measure is in intervals or semitones.
- Ignoring the octave register: A C and a C an octave higher are two different notes. Anyone who compares only the names measures a unison instead of an octave.
Continue on Maikstrings
Related terms
FinalisModeChurch modeOctaveIntervalMelodyPitchOne-line octave
Editor: Maik Krohm · reviewed on 3 October 2026
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